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From Perhentian Islands, Malaysia



 
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Brian Mayes




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PostPosted: 15.07.2011, 17:59    Post subject: From Perhentian Islands, Malaysia Reply with quote

Please help me identify this species.
I found it just off Pulau Perhentian Kecil on a sandy bottom with occasional soft corals at a depth of 22m.

Anterior view with mantle


Posterior view with mantle partly retracted.
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Myosotis




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Joined: 13 May 2010
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PostPosted: 20.07.2011, 00:54    Post subject: Reply with quote

It seems to be [i]Prionovolva wilsoniana[/i] (reference : book of Lorenz&Fehse "The Living Ovulidae").
Great dive !
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Brian Mayes




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PostPosted: 20.07.2011, 11:39    Post subject: Reply with quote

I don't think it's Prionovolva wilsoniana, because the live animal looks very different.


Image of Prionovolva wilsoniana found on spiky soft coral (Dendronephthya sp.) also in the Perhentians, Malaysia.
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wei





Joined: 30 Jan 2009
Posts: 37

PostPosted: 22.07.2011, 03:08    Post subject: Reply with quote

Hi, it looks like a Diminovula to me. Striking animal that I'm not familiar with though. Nice photos!
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Brian Mayes




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PostPosted: 22.07.2011, 18:21    Post subject: Reply with quote

Thanks Wei.

I agree it does look like a Diminovula, especially with the yellow line around the shell. However, the live animal doesn't seem to match any of the Diminovula that I know or can find here http://www.flickr.com/search/?w=all&q=diminovula&m=text
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wei





Joined: 30 Jan 2009
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PostPosted: 23.07.2011, 07:05    Post subject: Reply with quote

That was my first impression too, but then again I haven't seen many animal photographs of this genus except those that occur around my area.
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felix
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PostPosted: 28.07.2011, 10:04    Post subject: Reply with quote

This is Diminovula whitworthi. The mantle colour is strange though. In any case, it is a difficult group indeed...
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Brian Mayes




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PostPosted: 28.07.2011, 10:27    Post subject: Reply with quote

Thanks Felix. As you say the mantle is very different to A32 in your book. Is the yellow line around the shell more an indication of D. aurantiomacula?
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felix
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PostPosted: 29.07.2011, 16:25    Post subject: Reply with quote

well, yes, but basically aurantiomacula and whitworthi are very close, either the same, or a complex of several other species. The yellow line is sometimes apparent in the living shell but then fades rapidly in the dead shell
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